The “skeleton” version of Team Möbius was leaner than ever this past week here at Naval Yachts as we are down to just two part time workers onboard Möbius this past week.  However, along with Christine and myself and our Dynamic Duo of Nihat and Uğur we all put in a very full week and they made great progress in finishing all the “hotworks” of welding up the Tender. 

So this will be another shortened version of these Weekly Progress Updates but I’m delighted to share all I have with you.

I will leave the largest progress on the Tender for the end this week and so let’s jump in first to what did get done this week on the Interior of Möbius thanks to the couple of days that our Sparky Hilmi and our Hardware guru Serkan were onboard.


IMG_20200828_171805I’ve received a lot of comments and questions (thanks!) about these bits of boat jewellery that masquerade as our eXtremely solid latches on all our cabinet doors and drawers and we like them more every time we see them and start to use them.
IMG_20200829_102823For those who have not seen these latches before they are solid 316 SS and work simply with a light one finger lift like this.
IMG_20200831_161453When you add up all the drawers and doors in both cabins, the Galley, the Corridor Office and the Salon we have a LOT so Serkan has been a busy boy getting these all done. 
IMG_20200829_102909It might sound as simple as “drill a hole and thread the latch body in place” but it is actually very eXacting and finicky work to get the holes in just the right location so the latch mechanism lines up.  Adding to the challenge all the Rosewood doors and drawer fronts have already been finished and polished so drilling these holes without any splintering or pull outs takes some finesse.  But Serkan is appropriately OCD when it comes to the quality of his work and hey now as almost all the latches installed but for a few in the Master Cabin.
IMG_20200903_102446Such as these two drawers underneath Christine’s Office Desk.
IMG_20200831_111853These ones in the Galley Drawers,
IMG_20200901_094428Galley Garage doors,

I hope to be able to show you all the latches in the Master Cabin in next week’s Progress Update.
IMG_20200918_182602Up at the Main Helm, Serkan and Hilmi worked together to mount the em-trak Class A AIS I mentioned last week.

It is the rectangular screen you see here in the upper Right corner of the Black leather ceiling overtop of the Main Helm.

IMG_20200914_100738Another example of those “how hard can this be?” jobs as there are a lot of different cables that Hilmi had to run from a lot of different locations on the boat with the AIS antennae being up on the Main Arch, the dedicated AIS GPS head up on the front Port side of the Pilot House, data cables going to the N2K system and +/- 24V cables to power the whole thing.

Serkan then needed to put the hole for all these cables in the Black leather covered removable ceiling panel overhead of the Main Helm and then attach the holding bracket that the em-trak AIS unit attaches to.


Positioned for clear viewing whether seated or standing at the Helm and the whole unit can also pivot and tilt so we can orient it to keep an eye on when eating at the Dinette Table or in the Galley.


Open HatchSince we first started installing them, I have also received a lot of questions and comments about the Deck Hatches I designed and we built in house here at Naval Yachts.  Boat owners, especially those of us doing long passages, typically have a love/hate kind of relationship with Deck hatches.  Just Love all the light and fresh air they bring in BUT they almost all start leaking relatively early in their life. 

Of course, Mr. Murphy ensures that when they do leak, that water will always land in the most annoying spots such as in your face as you sleep, soaking your bed or seats or dripping onto electronic gear.  Ask me how I know??!!!!
Hatch Section labelledTherefor, one of our priorities when we were designing Möbius was to make sure that we had eXtremely Leak Proof Hatches!  After many months of research and sketching, this is the design I came up with in my favorite 3D modeling program, Fusion 360.
Hatch Section with edge seal infoThese two section views shows some of the key features to ensure these stay fully waterproof with large self draining gutters around the flush mounted 15mm glass lids and edge seals around the inner frames.
TrimLok hatch sealsI spent a LOT of time searching for the Goldilocks edge seals and finally found them at Trim-Lok in the USA which makes the seals for many automotive manufacturers and other industries.  Trim-Lok has a great site that allows you to custom design your own seals with an interactive “Hatch Seal Product Builder” where you chose details such as thickness of the “edge” the seals will attach to which in our case is the 8mm thick upper vertical edge of the aluminium inner hatch frames.  Then you chose which side, A, C or E you want the “bulb” part of the EPDM rubber seal to attach to and the width or “leg length” of the grippy rubber U-section you want.
TrimLok Hatch seal dwg 2 closedI designed these Inner Frame of the Hatches and then the Trim-Lok Hatch Seals such that as you close the Hatch Lid, the upper rubber bulb part of the seal is compressed to the Trim-Lok specifications for the just right and maximum sealing.

Once you have your seal all designed you just specify things like colour, type of rubber and how many linear feet you want and they ship it to you all coiled up in a box.  It is always a treat when I can work directly with the manufacturer and it was a great experience working with Trim-Lok to design and build the Goldilocks Hatch Seals for Möbius.

IMG_20200904_133309This is what those Trim-Lok seals look like in the real world aboard Möbius.  Pretty self explanatory; the deck surface is on the far Left here and then you can see the deep Gutter formed by the Outer AL Frame and one of the two drain holes in the bottom.
IMG_20200904_133305Christine and I spent some time last week doing a test fit installation of the Trim-Lok seals on this one hatch up in the ceiling of the “doghouse” overtop the entryway into the Workshop off of the Swim Platform.  3D modeling and custom Hatch Seal Builder tools are great but they are still all theoretical so we were anxious for this real world fitting. 
Fortunately the seals and the hatches worked even better than we had hoped.  The “squish” was just right both for maximum sealing as well as the just right about of resistance as you lock or “dog” the hatch handles down.

Hatch Hinge Boxes close upJust to up the challenge, I added some other requirements for this design such a having their glass tops be flush with the AL decks so they are no edges laying in wait to bite your toes as you walk around on deck usually in bare feet.  Perhaps even more importantly,  no edges to snag lines and ropes.

However the #1 feature attracting me to Flush Hatches is that when you take on big waves breaking over the bow or sides, flush hatches have no edge for this deluge of water to press against the seals as it all runs straight overtop.

Hatch Hinge Boxes insideAnd If I’m going to have no protrusions of the Hatch Lids, then surely I had to also get rid of the Hinges right?  So the renders above and on the Left show how I made the hinges disappear when the Hatches are closed.
Hatch Latch & Handle sketches[3]Recently I completed what I felt was the Goldilocks design for the latches and handles for these 10 Deck Hatches and had them all CNC milled from billets of solid aluminium I had on hand. 

Hand sketching is my preferred method of thinking through a design and coming up with lots of alternative ways of meeting my design goals.
Hatch Handle square designThese are two of my early sketches for the Hatch Handles and Latching system that I ended up with. 
Hatch Handle closed Fusion 360Once I have the basic design details worked out in my sketches I then move over to Autodesk’s Fusion 360 ** to work out the precise details and end up with a fully developed 3D model that can then talk to the CNC milling machine to make them.
** Full Disclosure, I was privileged to work for Autodesk Inc. for over 25 years so I may be a wee bit biased but I continue to be amazed at what all they have been able to pack into Fusion 360 and yet keep it so amazingly easy and powerful to use.

Hatch Handle detail latch onlyI’ve removed the Handle here to show how the round Upper Boss is bolted to the 10mm thick CNC cut Hatch Lid which the 15mm Glass will soon be glued to.  The Purple part below is the 20mm thick Latch Block or Plate where the “nose” of the Handle slides under to pull the Lid closed.
Hatches with Handles Iso view in Fusion 360I’ve made all the parts somewhat transparent in this quick render to give you a bit of X-Ray vision to see how all the various features such as the Handles, Lid and Hinges all work together.  Click this or any blog image to enlarge it for a closer look.
IMG_20200904_155303Here’s what one of those Hatch Handles looks like over in the real world.  That Latch Block on the Right has two threaded holes on the back side where it is through bolted by two SS Hex-Head bolts going through the Inner Frame.
IMG_20200904_155706First test fitting of a pair of Hatch Handles.

This is how the Handles are oriented in their Closed position.
IMG_20200904_170443And this is where the Handles sit in the Open position.
IMG_20200904_155229The smallest three of the ten Deck Hatches are 450mm / 18” square and their width is too small for the two Handles to fit when you move them to the Open position.  My KISS solution was to make one of the Handles a mirror image of the other like this so their ends can overlap and yet still give you the full size handle to close.  Worked out very well.
IMG_20200904_135421As you can see from this design, getting those round Handle Bosses bolted to the Lids in the exact right position is quite critical to them working properly so after a bit of pondering here is the technique I came up with to mount all 20 Bosses.

First lay out the exact center of the Boss and Handles with some calipers and a center punch to position the point of the drill bit.
IMG_20200904_152235Drill and Tap that hole and thread a length of an M8 – 1.0 threaded rod through it.
IMG_20200904_152300Then thread the AL Boss onto the rod and tighten the rod to hold it in the correct alignment for drilling the four bolt holes.
IMG_20200904_143003Getting those four holes all drilled in just the right spot was the critical part of this challenge and the fun trick I came up with was to use the CNC machined AL Bosses as their own drilling jigs.  Once I had them tightened up with that center through bolt, I then made up a little “pipe” that had the outside diameter to fit snuggly inside the four holes in the Bosses and then used a drill bit that was the same size as the inside diameter of the SS pipe.
IMG_20200904_143035A bit time consuming with 80 holes to drill and tap but t worked like a charm and I just repeated this process for all 20 Bosses.
IMG_20200905_140143One of the 650mm square Hatches is underneath the circular staircase going up to the SkyBridge so it was a bit more challenging to get at but it too was soon all drilled.

IMG_20200904_144743With the holes drilled in just the right locations it was straightforward to tap each hole with M6 threads
IMG_20200904_145651Put a bit of Loctite on each SS bolt and torque them down just right and they were soon all done.
IMG_20200904_155303Next challenge is to get all 20 of these rectangular Latch Blocks bolted in precisely the right spot on the Inner Frames and I’m hoping to get to that next week so stay tuned.


At the opposite end of the progress spectrum, Uğur and Nihat put in a very full and very hot week working on the Tender to Möbius and I’ll do as I have been in previous posts and show you their progress with a rapid fire series of photos and a bi of text along the way.


With the “Mickey Mouse” opening in the 20mm thick Transom Plate all cut out we wanted to do another test fitting of the Castoldi 224DD jet drive and then mark the centers of all the holes around both the rectangular frame on the bottom and the Transom.

IMG_20200914_104937I also needed to check that the two hydraulic cylinders that mount through Mickey’s ears had the right amount of clearance so I climbed inside the Tender, cylinder in hand while the boys lowered the Castoldi into place above me.
IMG_20200914_100454Perfect fit on the inside.
IMG_20200914_100350And the outside at this critical 93 degree angled corner between the bottom of the hull and the Transom.
MVIMG_20200914_113936Centers of all the holes laid out before removing the Castoldi, center punched each one and it was quick and easy to drill all the holes in this Frame and the Transom.
IMG_20200914_115735Christine keeps remarking that she can’t get over how bit our “dinghy” is to which I reply, “Look Up!”  Looks pretty small now don’t you think?
IMG_20200914_122053With the Castoldi jet drive all fitted and holes all drilled and all the bottom welding finished,  it was time to flip the hull back right side up again.
IMG_20200914_154141And get to work putting in the rest of the CNC cut 6mm AL plate.

Engine Beds now all welded in and the inner walls of the hull getting tacked in place.

IMG_20200914_181905Time to assemble the Swim Platform which doesn’t take them too long.
IMG_20200915_094808A quick test fit and Uğur welds it all up.
IMG_20200915_122058This is going to be a great platform that will make snorkeling and Scuba diving SO much easier than from a RIB as well as making rear boarding very easy.
IMG_20200915_122107However the primary purpose of the Swim Platform is to protect the Jet Drive bucket and nozzle from docks and rocks at the rear and it will do an eXcellent job of this too.
IMG_20200915_171335Starboard side Console shaping up nicely as well.
IMG_20200916_151117As is the platform of the seats behind.
IMG_20200917_114013Test fitting the tacked up Lid over the Engine Bay.  It will be hinged at that forward seam and lift up with the assistance of two gas spring lift cylinders like the rear hatch of an SUV.
IMG_20200917_114321Nihat opens up the forward 100L fuel tank that will provide an access port for cleaning and servicing.
IMG_20200917_172410Inner frame for the access port tacked in place.

Uğur was now able to get inside to finish welding this fuel tank from the inside to fully seal it off from the two side “tanks” which we will most likely use for additional dry storage rather than fuel.

IMG_20200918_114822Holes drilled and tapped, gasket made up and in place.
IMG_20200918_114806Uğur the Ninja Welder soon had the dashboard all welded up and bolted the SS piano hinge in place.
IMG_20200919_120251We used the same edge seals as for the Hatches you saw above around the circumference of the hinged dashboard to keep it all weathertight.  Once I get to fitting out our Tender I’ll add some latches for this Dashboard, the Engine Lid and other access hatches throughout the Tender but that is much further down the priority list right now.
IMG_20200918_181931Et Voila!  The Center Console is pretty much all welded up.
IMG_20200919_120301Ever the productive one, Uğur spent a bit of time in the machine shop and whipped up these two hinges that he will weld on next week to the Engine Lid.

So stay tuned for next week’s episode of “How the Tender Turns”


IMG_20200918_182252I spent quite a few hours with Mr. Gee this past week and while not too visible yet, got lots done in terms of the mounting some of the critical equipment he will be powering such as the two 250A @ 24V Electrodyne “Big Red” alternators one of which you can see here in the upper Left corner.  That one will mount to a beefy bracket I designed this past week that will bolt to the flat horizontal pad you can see above it on Mr. Gee’s front Left corner.
IMG_20200918_133902I also spent a few hours setting the camshaft timing and the valve clearances.  This photo is showing the simple process of setting the clearance between the ends of the valve stems and the rocker arms using a 0.008” for the Exhaust valves and 0.004” for the Intakes. 
IMG_20200918_182245And in case you were wondering what the “Bling” in this week’s title was referring to, I spent a few minutes on the polishing wheel to see how well these little access port covers on the two cylinder heads would polish up.  Still very crude as I need to spend much more time prepping those surfaces, but I think this will add a Goldilocks nice touch of class to Mr. Gee to great you as you enter the Engine Room!
And that folks, is the week that was September 14-19, 2020 here in Antalya Turkey aboard the good ship Möbius.

Thank you SO much for joining me and even more thanks for posting your questions and comments in the “Join the Discussion” box below.

Ciao for now,